Lamp



FIG. 1 is a top isometric view of a lamp showing my new design;

FIG. 2 is a bottom isometric view thereof;

FIG. 3 is a top view thereof on a reduced scale;

FIG. 4 is a bottom view thereof on a reduced scale; and

FIG. 5 is a side elevational view thereof. 

The ornamental design for a lamp, as shown and described. 